Most surgeons seem to favour the former method. Even when the erisophake is used instead of forceps, the technique of zonulolotomy and delivery of the lens remains essentially the same. Since the introduction of A.C.T., however, mechanical zonulolotomy has been replaced by enzymatic zonulolysis and the extraction of the lens by seizing it at the 12 o'clock position is being increasingly practis...

a long-term study was conducted between 1985 and 2003 on rehabilitation trials at sishen ironore mine, south africa, to identify grass species that would survive in the artificial growth medium appliedto the sites, and to determine the most suitable medium for sustainable vegetation growth. vegetationestablishment was tested at slopes of 18° and 34° and with five different cover materials. afte...

A reaction diffusion system with a distributed time delay is proposed for virus spread on bacteria immobilized on an agar-coated plate. A distributed delay explicitly accounts for a virus latent period of variable duration. The model allows the number of virus progeny released when an infected cell lyses to depend on the duration of the latent period. A unique spreading speed for virus infectio...

Achievement of appropriate precision is a major challenge for the clinical laboratory, particularly in specialized fields such as enzymology and immunochemistry. Especially in immunochemistry, where accuracy can only poorly be checked because of a lack of reference methods and a multitude of detectable epitopes, precision remains an important index of quality. In immunochemical methods there ar...

11 HASSID and ABRAHAM, Chemical Procedures for Analysis of Polysaccharides, in: Methods of Enzymology, Vol . 3, Academic Press, New York 1957. 12 F. W. FALES, J. biol. Chemistry 193, 113 [1951] . 13 N. NELSON and M. SOMOGYI, as cited in Practical clinical B i o c h e m i s t r y , H . V A R L E Y , 4 t h e d i t i o n , W . HEINEMANN, Medical Book Ltd., London 1967. 14 O. FOLIN and H. Wu, as ci...

This review describes the life of Sir John Cornforth AC CBE FRS, who was awarded the Nobel Prize for Chemistry in 1975. It covers his early life in Australia, his work in Oxford, the National Institute for Medical Research, the Milstead Laboratory of Chemical Enzymology and the University of Sussex, together with the contributions made by his wife, Lady Rita Cornforth.

DNA glycosylases safeguard the genome by locating and excising a diverse array of aberrant nucleobases created from oxidation, alkylation, and deamination of DNA. Since the discovery 28years ago that these enzymes employ a base flipping mechanism to trap their substrates, six different protein architectures have been identified to perform the same basic task. Work over the past several years ha...

Plasmodium falciparum develops within the mature RBCs (red blood cells) of its human host in a PV (parasitophorous vacuole) that separates the host cell cytoplasm from the parasite surface. The pore-forming toxin, SLO (streptolysin O), binds to cholesterol-containing membranes and can be used to selectively permeabilize the host cell membrane while leaving the PV membrane intact. We found that ...

The effects of continuous whole body exposure to extremely low frequency magnetic fields (ELF-MF) (50 Hz,0.5 mT for 30 days24 hrs) on cytogenecity, bone parameters and some hematological and biochemical parameters were evaluated.Male rats were exposed continuously to ELF-MF for a period of 30 days. The exposure effects were assessed by measurements of micronucleus formation, DNA fragmentation a...

INTRODUCTION To demonstrate that preoperative treatment for 28 days with topical dorzolamide/timolol is non-inferior (Δ = 4 mm Hg) to oral acetazolamide and topical dexamethasone (standard therapy) in terms of intraocular pressure (IOP) reduction 3 and 6 months after trabeculectomy in glaucoma patients. MATERIALS AND METHODS Sixty-two eyes undergoing trabeculectomy with mitomycin C were inclu...